The computer teacher who allegedly threatened to blow a Bronx school sky high says he was just making a “political” statement when he barricaded himself in his classroom, sparking a standoff with police.

“A teacher did not snap. A teacher did not threaten to blow up the school,” Francisco Garabitos, 55, who had been barred from MS 328 in Marble Hill after allegedly choking a student, said in an interview with The Post.

“I just said I was going to shut down the school,” said the 28-year veteran, who forced authorities to evacuate the school’s 1,200 students during Friday’s three-hour staredown.

On Thursday, Principal Dorald Bastian had banished Garabitos to a “rubber room,” away from students, after he allegedly grabbed a sixth-grader by the neck and slammed him into a wall, a charge the teacher denies.

In all, Garabitos has been investigated 14 times for alleged incidents of corporal punishment, two of which have been substantiated. While that has earned him reprimands, officials had never before tried to remove him.

“I wanted the Department of Education to come and investigate the principal,” Garabitos said.

The eccentric teacher — who has penned 9/11- themed love novels, get-rich-quick books, and philosophical tracts on genocide — explained that he had a beef with the school’s administration, that he was “pursuing change,” and that he “never mentioned” a bomb when he called 911.

“It’s a political movement by the union,” he said. “The union wants a change of administration. We negotiate, but when they don’t pay attention, we try to do something dramatic.”

After spending Friday night in jail, Garabitos was released without bail yesterday. The charges filed against him — criminal trespass, obstructing governmental administration and disorderly conduct, all misdemeanors — make no mention of a bomb threat.

The episode came just a month after 20 teachers sent a letter to the school superintendent that said tensions with Bastian had become so acrimonious that 60 percent of the staff had left the school over the last two years.

“We have tried our best to work with Mr. Bastian, but he has unfairly abused the power of administration to micromanage the instructional process and prompted the transfer out of potentially good new teachers,” read the letter, obtained by The Post.

Bastian did not return calls for comment.

Officials of the United Federation of Teachers said they were aware of the dispute at the school.

But they sought to distance themselves from Garabitos’ actions.

“Nobody — I don’t care who it is — should put kids in harm’s way,” said UFT President Randi Weingarten.